And–or Tree
An and–or tree is a graphical representation of the reduction of problems (or goals) to conjunctions and disjunction In logic, disjunction (also known as logical disjunction, logical or, logical addition, or inclusive disjunction) is a logical connective typically notated as \lor and read aloud as "or". For instance, the English language sentence "it is ...s of subproblems (or subgoals). Example The and–or tree: represents the search space for solving the problem P, using the goal-reduction methods: :P if Q and R :P if S :Q if T :Q if U Definitions Given an initial problem P0 and set of problem solving methods of the form: :P if P1 and … and Pn the associated and–or tree is a set of labelled nodes such that: # The root of the tree is a node labelled by P0. # For every node N labelled by a problem or sub-problem P and for every method of the form P if P1 and ... and Pn, there exists a set of children nodes N1, ..., Nn of the node N, such that each nod ...
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Graphical Representation
Graphic communication as the name suggests is communication using graphic elements. These elements include symbols such as glyphs and icons, images such as drawings and photographs, and can include the passive contributions of substrate, colour and surroundings. It is the process of creating, producing, and distributing material incorporating words and images to convey data, concepts, and emotions.Definition of Graphic Communications
Graphic Comm Central, 2008. Accessed 25 Feb 2009. The field of graphics communications encompasses all phases of the graphic communications processes from origination of the idea (design, layout, and typography) through reproduction, finishing and distribution of two- or three-dimensional products or electronic transmission.
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